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| Author(s): |
Ingrid Regina Avanzi
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Eletrotécnica e Energia (IEE/BT) |
| Defense date: | 2016-12-21 |
| Examining board members: |
Cláudio Augusto Oller do Nascimento;
Benedito Correa;
Pedro Roberto Jacobi;
Dácio Roberto Matheus;
Paula Bruzadelle Vieira
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| Advisor: | Cláudio Augusto Oller do Nascimento; Elen Aquino Perpetuo |
| Abstract | |
Recently, technological development has been resulted in an industrial growth and has been creating serious environmental problems as concern worldwide. Toxic metals have received special attention among many others contaminants, because their persistence in ecosystems and their capability of accumulation throughout the food chain (even in low amounts). Environmental legislation in Brazil has very strict standards regarding discharge of toxic metals contaminated water. For a successful treatment of such effluents, it is relevant to concern about new technologies more efficient and economics to allow the removal of metals heavy from contaminated environment. Today the treatment of contaminated area is carried out conventional technologies based on physicochemical principles, which are inefficient and uneconomical. Alternatively, a new technology, called bioremediation, is being more important due to the advantages it offers: simplicity, efficiency and low cost. Bioremediation may be a viable alternative for areas contaminated by toxic metals. It\'s needed to evaluate the use of resistant and effective microorganisms in removing the metal, because it\'s required to be selected organisms with favorable characteristics for the process. In this context, the aim of this project is isolating and characterizing microorganisms from a mining area, evaluating the mechanisms and strategies for using in the remediation of contaminated areas, in order to optimize its adsorb heavy metal ions ability and use these bacteria for bioremediation of mining effluents. This work isolated and identified 105 strains resistant to copper, 12 of them were able to grow up to 7.5 mM copper, adsorption experiments with toxic metals (Cu, Cd and Ni) showed that these strains are promising in expanding technologies for sustainable mining, such as the exploitation of low concentration metal sources, turning waste into economically viable mining and environmentally friendly. (AU) | |
| FAPESP's process: | 12/06600-7 - Study on microbial activity in bioremediation of heavy metals in Amazon area |
| Grantee: | Ingrid Regina Avanzi |
| Support Opportunities: | Scholarships in Brazil - Doctorate |